Abstract Combined steam/dry reforming of bio-oil with blast furnace slag as heat carrier for the syngas production with the H2/CO ratio of 3:1 for further methanation, was investigated. The increase of H2O addition can increase the total yield of H2 and CO, but also increase the critical temperature at which 3:1-H2/CO syngas was obtained, while the increase of CO2 addition can decrease the critical temperature, but the syngas yield was also decreased. When the steam/carbon (S/C) ratio was 3.0 and the CO2/carbon (CO2/C) ratio was 0.5, the critical temperature decreased to 804 °C, with the potential H2 yield of over 90%. Although the addition of slag and how much slag to be added had almost no any thermodynamic effect on the combined reforming of bio-oil under the condition where higher potential H2 yield can be obtained, the slag as heat carrier could supply all heat for the combined reforming process. When the added slag mass was 3.99 times bio-oil mass, the combined reforming at the S/C ratio of 3.0 and the CO2/C ratio of 0.5 can occur spontaneously for the production of 3:1-H2/CO syngas. The present study could offer important guidance toward utilization of this novel process for further methanation.

中文翻译：

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以高炉矿渣为热载体的生物油蒸汽/干法联合生产H2/CO合成气

摘要 研究了以高炉渣为热载体的生物油蒸汽/干法联合重整生产H2/CO为3:1的合成气进一步甲烷化。H2O添加量的增加可以提高H2和CO的总产率，但也提高了获得3:1-H2/CO合成气的临界温度，而CO2添加量的增加可以降低临界温度，但合成气产率也减少了。当蒸汽/碳(S/C)比为3.0，CO2/碳(CO2/C)比为0.5时，临界温度降至804℃，潜在H2产率超过90%。尽管在获得较高潜在H2产率的条件下，加入渣和加入多少渣对生物油的联合重整几乎没有任何热力学影响，炉渣作为热载体可为联合重整过程提供全部热量。当加入的炉渣质量为生物油质量的 3.99 倍时，S/C 比为 3.0 和 CO2/C 比为 0.5 的组合重整可以自发发生，用于生产 3:1-H2/CO 合成气。本研究可为利用这种新工艺进行进一步甲烷化提供重要指导。